Water-tube boiler.



Np. 534,045.; Patented oef. s, |399.

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A. s. vom. WATER TUBE BDILER.

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UNITD STATES PATENT OFFICE.

AXEL s. voer, or PHILADELPHIA, PENNSYLVANIA.

WATER-TUBE soiree.v

SPECIFICATION'for-ning part of Letters Patent 110,634,045,:lated'October 3, 1899-. Application Iiled February "i, 1899. Serial No.704,795. (No modali) To all whom, it iii/Cty concern/r Be it known thatI, AXEL' S. VOGT, aresident of Philadelphia, in the county 'ofPhiladelphiaand State of Pennsylvania.; have invented certain new and usefulImprovements in Water-,Tube Boilers, of which the following is aspeciiication.

These improvements in water-tube boilers providefor thel readywithdrawal of any nest of tubes without disturbing the others, permitthe ready adjustment of the baiiles, secure facility for expansion,provide for unin- .terrupted steaming, and secure generally a highdegree of convenience, economy, and efciency.

In the accompanying drawings, Figure 1 is a front elevation of a.water-tube boiler einbodying these improvements.` Fig. 2 is' a frontView, in vertical section, parallel to the view shown in Fig. 1. Fig.V 3is a sideI view,

in vertical section, at rightangles to the View shown in Fig. 1. Fig. 4is a partial rear elevation. Fig. 5 is a sectional elevation'illustrating the connections4 between the rear water-legs and risers.Fig. 6 is a sectional elevation illustrating the connections between thefront risers and the drum..

Referring to the drawings; the foundations 1 and 1' support the frontwater-legs 2 and 2 and the rear water-legs 3 and 3. The waterlegs' and3, are connected together1 bythe water-boxes et and are'connecteddirectly to the drum 5, the water feeding from the drum downward throughthe legs into the boxes. The water-legs 2.and 3 are connected by thewater-boxes 6 and the water-tubes 7, forming, with the insulatingmaterialS, end walls for the construction. The water-legs `2 and 3 areconnected by the water-boxes 6 and by the double row of tubes 7',between which is placed a wall 8' of insulating material, such as slabsof asbestos, magnesia, or other refractory material. A grate 9 isprovided in each of the combustion-chambers, limited by the walls 8 and8', the construction forming two practically independentcombustionchamberseach of which may be operated independently of theother. The rear risers 10 rest loosely upon the chairs 11, supportedupon the water-boxes 4. The front risers 12 rest loosely directly uponthe girders 13, perforated, as at 13', to permit air to pass into the'combustion-chambers and alternately front risers and water-legs areconnected to the drum by the tubes "18.

Each of the rear risers 10 is connected to the water-box et by a valvedbend. The bend rcomprises a nipple 20, screwed into theriser 10,l upsetas at 21, locked lbya nut 22, and having a flange 23, a nipple 24,screwed into the water-box 4, upset as at 25, locked by a nut 26,'andhaving a flange 27, a joint 28, having flanges 29 and 30 forattachmentto the respective flanges 23 and 27, a cap 31 for permittingaccess to the interiors, and a valve .32, which seats upon the port 33and closes the( communication between the waterbox et and the riser 10.

Each of the front risers 12 has a sleeve connection with thecorresponding tube 18 Where'it is held-by. the nuts 3i and 35. Wherejoints of this character are employed, they may be made water-tight bythe use of soft- 'metal rings or packings, as 3e and 35. The section ofthe tube which lies Within the riser is provided with ports 36, throughwhich water passes from the riser into the tube. The interior of thetube is tapered inwardly from a point nearthe end to a point beyond theports, as at 10, to provide for the action of the'conical valve 37,which may be moved longitudinally to the point 40 to close the tube.This valve is swiveled on the threaded valve-stem 38, which may be movedthrough a plug 39, screwed into the end of the tube. Astuiiingbox 39',fixed in the plug 39, and a cap 4.1,

screwed on the end of the tube, afforda suit- -able closure for the tubeend. Vhen the IOO front risers are to be withdrawn, the valve 37 Y f isrun in to the point 40, closing the tube. v

The cap Ll1 and the nuts 3a are then removed, l a passage havin g aseparable connection with when the riser may be disconnected.

As each rear riser 10 and its corresponding front riser l2 with theirconnecting-tubes 17 have no steam and water connections with the systemand no fixed connections but the bend connection with the water-box 4and the sleeve connection with'the tube 1S, it will be seen that byclosing the valves 32 and 37, disconnecting the flanges 23 and 29, andremoving` the cap 41 and the nuts 34 each nest of tubes can be withdrawnimmediately and repairs or cleaning effected with facility andexpedition. As either combustion-chamber may be operated independentlyof the other,

the ire may be drawn in that one in which cleaning, adjustment, orrepairs are required, While the other may be worked during the time suchoperations are being carried on. Thus the steam and water circulationmay be continued through the entire system, excepting the nest, which iscut out Jfor any required purpose. y

In order that either combustion-chamber may be used independently of theother in the use of forced draft, the foundation l' is constructed toform a division-wall between the two ash-pits. To provide for readilycleaning oii the tubes and baffles, hollow stay tubes or openings, as4l', may be employed in convenient locations, through which steam may beblown.

It will be understood that sinuous or any other usual form of headeradapted to this construction may be employed and that the mechanicaldetails may be changed otherwise, as found expedient.

I claim- -l. In a boiler, a drum, a header having a separable valveconnection with a passage leading from said drum, a second header havinga separable valved connection with a passage leading to said drum,whereby said head* ers may be cut oft and separated from said drum,means for keeping said passages closed after said headers are removedand water-passages connecting said headers, substantially as specitied.

2. In a boiler, a drum, a series of sectional headers having connectionswith the passages leading from said drum, a valve for cutting off eachheader from communication with said passages, a second series ofsectional headers having connections with the passages leading` to saiddrum, a valve for cutting off each of said second headers fromcommunication with said second passages, and passages connecting saidfirst and second headers, substantially as specified.

3. In aboiler, a drum, water-legs connected with said drum, a water-boxconnecting said water-legs, a header resting upon said waterbox, aseparable connection between said headers and said water-box, a valvefor cutting otl said header from said water-box, a second headerconnected with said first header,

said second header and leading to said drum, and a valve for cutting oftsaidsecond header from said drum, substantially as specified.

4. In a boiler, a drum, water-legs connected with said drum, a water-boxconnecting said water-legs, headers resting loosely upon said water-box,water-passages connecting said headers and said water-box, a second setof headers having water-passages connected with said first set ofheaders, a support upon which said second headers rest loosely, andwater-passages connecting said second head* ers and said drum,substantially as specified.

5. In aboiler, adrum, water-legs connected with said drum, a water-boxconnecting said water-legs, sectional headers resting loosely upon saidwater-box, water-passages connecting said headers with said water-box,and means for disconnecting said headers therefrom, valves for cuttingoft said headers from said water-box, a second set of sectional headersloosely supported and connected respec tively with said rst headers,Water-passages connecting said second headers with said drum and meansfor disconnecting said headers therefrom, and valves for cutting oftsaid second headers from said drum, substantially as specified. 1

6. In a boiler, adrum, water-legs connected at the respective ends andintermediate of said d rum, a second set of water-legs andwater-passages therefor connected respectively with said firstwater-legs, insulating material forming with said passages end Walls anda division-wall, water-boxes connecting said tirst water-legs, sectionalheaders, valved connections between said headers and said water-boxes, asecond set of sectional headers and water-passages between the same andsaid first headers, water-passages connecting said second headers withsaid drum, and valved connections between said second headers and saiddrum, substantially as specified.

7. In a boiler, a drum, water-legs connected therewith,a water-boxconnecting said waterlegs, sectional headers loosely supported on saidwater-box, separable valved connections between said headers and saidwater-box, a second set of headers connected with said first headers,supportsi upon which said second headers loosely rest, apertures whichpermit access for adjustment, and separable valved passages connectingsaid second headers with said drum, substantially as specified.

8. In combination, a water-box,a header, a bend con necting's'aidwater-box and header, a valve for cutting off said water-box from saidheader, and means for disconnecting said header from said water-box,substantially as specified.

9. In combination, awater-box,a chair supported thereon, a headersupported by said chair, a nipple connected with said waterbox, a nippleconnected with said header, a joint connecting said nipples, a valve forcon- IOO IIO

specified.

ll. In combination, a water-tube, a header sleeved and clamped thereon,a port in said tube communicating With said header, a conical are insaid tube, a conical Valve longitudinally movable within said tube toclose the same, a removable plug for the ends of said tube through whichsaid valves stem is operated, substantially as specified.

In testimonywhereof I have hereunto set my hand in the presence of thesubscribing witnesses.

y AXEL S. VOGT. Witnesses: Y

THOMAS S. GATES, CHARLES N. BUTLER.

